What’s Vulnerable › Vulnerabilities

CVE-2025-32035: DNN does not check the contents of a file when uploading files

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-08 · updated 2026-06-17
• Weakness: CWE-351

Description

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to 9.13.2, when uploading files (e.g. when uploading assets), the file extension is checked to see if it's an allowed file type but the actual contents of the file aren't checked. This means that it's possible to e.g. upload an executable file renamed to be a .jpg. This file could then be executed by another security vulnerability. This vulnerability is fixed in 9.13.2.

Affected products

• DotNetNuke CMS Fixed in 9.1.1: before 9.13.2 — fixed in 9.13.2

How to fix

Upgrade to a fixed version: DotNetNuke CMS Fixed in 9.1.1 9.13.2. Check the vendor advisory for mitigations.

References

• https://github.com/dnnsoftware/Dnn.Platform/commit/a5c13c3836cfbde374dc19dac032cd51af41050a
• https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-8q89-mqw7-9pp7

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